Table sugar has a chemical composition of c12h22o11. what is the mass of 8.88 moles of sugar
(unit=kg)

3.04 kg up to 3 significant figures

Explanation:

C12H22O11 = 12(12)+22(1)+11(16)= 342 grams = 342÷1000= 0.342 kg

AS atomic mass of carbon is 12 , hydrogen is 1 and of oxygen is 16

now  1 mole has a mass of 0.342 kg

8.88 moles have mass 0.342×8.88=3.04 kg up to 3 significant figures

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.